Plone 4.3 · Version Status
Plone 4.3 End of Life Date
Plone 4.3 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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Plone 4.3 is past end of life. This version no longer receives security patches. 1244 days past EOL — migrate to a supported version immediately.
EOL Date
Dec 12, 2022
1244 days past EOL
Latest Release
4.3.20
Standard release
Release Date
Apr 6, 2013
Plone 4.3 series
| Version | Latest | EOL Date | Status |
|---|
| → 4.3 |
4.3.20 |
Dec 12, 2022 |
EOL |
| 5.0 |
5.0.10 |
Dec 12, 2022 |
EOL |
| 5.1 |
5.1.7 |
Dec 12, 2022 |
EOL |
| 5.2 |
5.2.15 |
Oct 31, 2024 |
EOL |
| 6.0 |
6.0.15 |
Dec 31, 2027 |
Active |
| 6.1 |
6.1.4 |
Dec 31, 2027 |
Active |
What does Plone 4.3 end of life mean?
When Plone 4.3 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Plone 4.3 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Plone 6.1 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Plone 4.3 reach end of life?
Plone 4.3 reached end of life on December 12, 2022. This version is no longer receiving security patches.
Is Plone 4.3 still supported?
No. Plone 4.3 reached end of life on December 12, 2022 and is no longer receiving security patches.
What should I upgrade to from Plone 4.3?
The recommended upgrade from Plone 4.3 is
Plone 6.1 — the latest actively supported version. Check the
Plone full timeline for all supported versions.
What are the security risks of running Plone 4.3 past EOL?
When Plone 4.3 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Plone should migrate immediately or implement compensating controls.